LandOfFree - US Patents - Listing for Wells,Valves, closures or changeable restrictors

Wells – Valves – closures or changeable restrictors – Fluid operated

Balance line hydraulically operated well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Balanced area safety valve

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Ball drop circulation valve

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Ball seat having fluid activated ball support

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Ball seat sub

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Ball type shut in tool

Wells – Valves – closures or changeable restrictors – Fluid operated

Ball valve actuating mechanism

Wells – Valves – closures or changeable restrictors – Fluid operated

Ball valve actuating mechanism

Wells – Valves – closures or changeable restrictors – Rotated operator

Ball valve assembly

Wells – Valves – closures or changeable restrictors – Rotated operator

Ball valve housing

Wells – Valves – closures or changeable restrictors – Rotated operator

Ball valve loading apparatus

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Ball valve seat and support

Wells – Valves – closures or changeable restrictors – Destructible element

Bleedoff tool for well test system

Wells – Valves – closures or changeable restrictors – Fluid operated

Blow-out preventor

Wells – Valves – closures or changeable restrictors – Fluid operated

Blowout preventer

Wells – Valves – closures or changeable restrictors – Fluid operated

Bottom hole sampler and safety valve and valve therefor

Wells – Valves – closures or changeable restrictors – Fluid operated

Bottom-hole gas-liquid separator

Wells – Valves – closures or changeable restrictors – Destructible element

Bulged single-hinged scored rupture having a non-circular...

Wells – Valves – closures or changeable restrictors – Fluid operated

By-pass valve